If an argument in REST API is enum type with single value, it would be automatically set to the enum single value as the picture
shows below. But the argument is not required and changing a None value to a default enum value will distort customer's intention and cause unexpected result.
If an argument in REST API is enum type with single value, it would be automatically set to the enum single value as the picture shows below. But the argument is not required and changing a
Nonevalue to a default enum value will distort customer's intention and cause unexpected result.